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Long-Term Debt (Tables) | 6 Months Ended
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Jun. 30, 2016
Debt Disclosure [Abstract] |
Summary of Long-Term Debt | Long-term debt consisted of the following:
(Thousands of dollars) |  | June 30, 2016 |  | December 31, 2015
6% senior notes due 2023 (net of unamortized discount of $6,259 at June 2016 and $6,692 at December 2015) |  | $ | 493,741 |  |  | $ | 493,308 |
Term loan due 2020 (effective rate of 3.41% at June 30, 2016) |  | 190,000 |  |  | — |
Less unamortized debt issuance costs |  | (6,046 | ) |  | (3,526 | )
Total notes payable, net |  | 677,695 |  |  | 489,782 |
Capitalized lease obligations, vehicles, due through 2019 |  | 943 |  |  | 600 |
Less current maturities |  | (30,372 | ) |  | (222 | )
Total long-term debt |  | $ | 648,266 |  |  | $ | 490,160 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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